Riccia is a gametophyte plant. Its body cannot be divided into roots, stems and leaves. That is, they are thallus shaped. Thallus green, obtuse, succulent, recumbent, opposite and flattened. It is bifurcated. Each branch has a large groove at the tip. It is called apical notch. The surface of the thallus has a longitudinal groove. This is called dorsal groove. A median vein runs longitudinally along the dorsal groove. Many thallus arranged together like rose petals. This condition is called rosette. The thallus bears gemma cups which reproduce by organogenesis. Being green, it can produce food through the process of photosynthesis.